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(No Model.) 2 sheets-sheet 1. Y

S. A.,MAXWELL.

GIN SAW GUMMER. y No. 352,550. Patented Nov. 16, 1886.

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(No Model.) 2 sheets-sheet 2.

S. A. MAXWELL.

GIN SAW GUMMER.

No. 352,550. Patented Nov. 16, 1886.

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Unire STATES Aralar @Erica SINGIJETON A. MAXVELL, OF ALPHARETTA, GEORGIA.

GlN--SAW GUlVilVlER.

SPECIFICATION forming part of Letters Patent No. 352,550, dated November 16, 1886.

Application filed July 22, 1886. Serial No. 208,789. (No model.)

T @ZZ whom it may concern:

Be it known that I, SINGLETON A. WAX- WELL, a citizen of the United States, residing at Alpharetta, in the county of Milton and State of Georgia, have invented a new and useful Gin-Saw Glimmer; andI do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use t-he same, reference being had to the accompanying drawings, and to letters or iigures of reference marked thereon, which form a part of this specification.

This invention is an improvement in niachinesfor gumming or deepening` the indental spaces in gin-saws; and it consists in details that will be hereinafter fully described.

In the accompanying' drawings, Figure I is a side View of the gumming'machine in position on a saw. Fig. II is a vertical longitudinal section through a portion of the machine. Fig. III is a plan of the machine and several saws. Fig. IV is a plan of the seat on which the machine is longitudinally adjusted, and Fig; VII is an end view of the Fig. V is a cross-section throughthe iile and the clamp. Fig. VI is a plan of the lever by which motion is communicated to the iile-arm. Fig. VIII is a detail showing the rocking shaft and the arms through which motion is communicated to the connectingrod that actuates the feeding-pawl and contiguous parts. Fig IX is a detail showing a side andtop view of the intermediate piece in the gimbaljoint connecting the lower arm of the oscillating lever in the feeding mechanism to its actuating-rod.

In these drawings,1 represents the saws, and 2 the space-blocks, of a cotton-gin.

3 is a base-plate, which is adjustably connected to the angle-iron4 by the bolt 5, which passes through aslot in the angle-iron.

6 and 7 are standards, each pair of which are connected at the topin the form of an inverted U, except that the standards 6 are somewhat widened in form, to make a handhold for the purpose of lifting the machine.

The angle-iron 4 is pivoted to the base 8 by the bolt 9, and has in its opposite end a slot, by means of which it is adjustably attached to the base by the bolt 10, and its upper face has a slot, (Fig. IV,) through whichthe bolt passes for the purpose of allowing longitudinal adjustment of the part of the machine that is carried by the base-plate 3,. The base has two forwardlyprojecting arms, 11, which are so shaped as to have bearings at two places on the circumference of the space-blocks, the

bearings being so located as to cause the weight of the machine vto prevent longitudinal movement.

pieces 6 and 7, and has in its rear end a slot, 13, its forward end being forked and offset upwardly about its thickness, has bolted to its top and bottom sides guides 14, which form a rectangular opening for the swinging arm l5. The arm is pivoted at its rear end by the stud 16 in the slot 13 inthe plate 12, and has on iis forward end a clamp for the iile, consisting in the addition of the lips 1S, the strap 19, and screw 20 to the arm l5. The iile 17 has a knife-edge.

2l is a spur-gear running on the stud 22,A

and having on its top side cams, 23. These cams iinpinge against the stud 16, which is made 'for lthat purpose to project through the plate 12. Projecting from this spur-gear on the bottom side are the studs 24,which engage with the hook on theconnecting-rod 26. The hook 25 has a beveled edge, which in sliding against the stud 27 will disengage the hook, allowing .it to be pressed back to its original position by the spring 29, while the spring 28 carries it forward. rI`he stud 27 is on a plate, 3l, which is slotted for the screw 32,which fastens it on the lug on the U-shapedl piece 7, making the plate longitudinally adjustable. 'Ihe rock-shaft 35 carries a downwardly-projecting arm, 33,which is connected by a universal joint with the reciprocating rod 26, and also carries annpwardlyprojecting arm, 34, the oscillation of which actuates the doublepveeding pawl 38, through the connectingrod 37, which is pivoted at one end to a sleeve on the arm 37 and at the other end to the feeding-pawl. The screw 57 stops the pawl in its backward movement. The pinion S9-engages with the spur-gear 2l, and has on its bottom side a wrist, 40.

4l is a lever which oscillates on the fulcruin 42, and has in one end the slot 43, by which it The plate l2 is attached to the U-shapedV ICO . 11 on the space-blocks with a saw between cause the feeding-pawl to carry the saws foris connected to the wrist 40, and on the other l end the wrist 44, which works in the slot 45 inthe horizontally-swinging arm 15. Against the rear end of the swinging arm 15 is a spring, preferably a boW- spring, 46, which abuts at the other end against the angle-iron 47. This angle-iron has a slot, 48, through' which it is bolted to the frame by the bolt 49.

Motion is communicated through the crank 51, the shaft 52, and bevel-gears 53 and 54, the shaft 52 being provided with bearings 55 and 56.

It is obvious that several of the above details might be dispensed with, or others be substituted. I will therefore further describe only the operative partsv of t-he machine.

The machine is placed in position for operating by resting the forwardly-proj ecting arms them. The rear end of the base 8 should rest on a trestle or other support. The machine should be adjusted by the bolt 10 through the vertical slotted hole in the angle-iron to bring the file to the angle that will gum the saw-teeth to the desired shape, and then should be adjusted by sliding the base-plate 3 either backward or forward on the angle-iron 4 to bring the file to a -working position with regard to the size of the saw. A partial rotation of the spur-gear will revolve the pinion 39, which through its crank will give a vibrating motion to the arm 15 and carry the file, which is pressed forward by the spring 46, back and forth across the saw, deepening the indental spaces. The revolution of the spur-gear will cause the impingement of the cam 23 against the stud 16 inthe rear end of the file-bar 15, as shown in Fig. III, and in passing will draw the same back sufficiently to withdraw the file beyond the points of the teeth. During the time that the file is drawn back in this position by the cam 23 the stud 24 will .engage with, the hook on the connecting-rod and ward and allow the file to go`when released by the cam into another tooth. The stud 27 will cause the hook on the connecting-rod to be released from the stud on the gear, and the springs will return the feeding mechanism to its original position. It is desirable that the forward movement of the feeding-pawl should carry the saw forward to the exact position that will permit the file to enter the space next below the last tooth gummed. It is made -to do this by the longitudinal adjustment of the plate 3l to make the stud 27 release the hook on the connecting-rod when it has carried the saw forward the desired distance. The thumbscrew 57 is adjusted to allow the spring 28 to bring the pawl back one tooth, but no more. rllhe pressure of the file is regulated by the slotted abutting angle-piece 47, so as to cause a greater or less pressure by the spring 46, and the hole, through which the pivoting-stud 16 on the file-arm 15 is pivoted, is slotted to allow a free forward and backward movement of the arm 15.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a machine for gumming gin-saws, the combination of the file-arm 15, pivoted at its rear end in the slot 13, the guides 14, the spring 46, and actuating mechanism, substantially as described.

2. In a machine for gumming gin-saws, the combination of the file-arm 15, having stud 16, the spring 46, and the cam 23, substantially as described. l

j 3. In a gin-saW-gumming machine, feeding mechanism consisting of the studs 24 in a wheel, the stud 27 the hooked connecting-rod having a spring to keep it pressed against the stud 27, the lever 33 34, the sleeve 36, the connection 37, and the feeding-pawls, 'substantially as shown as described.

4. In a machine forgumming ginsaws, the combination of the gears 21 and 39, the wrist 40, the lever 41, the Iile 17, the file-arm having Vstud 16, thecams 23, the stud 24, the hooked connecting-rod 26, the adjustable plate 31, hav-` ing on it the stud 27 the lever 33 34, the screw 57, the sleeve 36, connecting-rod 37, and feed ing-pawl 38, all arranged on an adjustable supporting-base, substantially as shown and described, and for the purpose specied.

vIn testimony whereof I alix my signature in presence of two witnesses.

' SINGLETON A. MAXWELL. Witnesses:

A. l?. Woon, JOHN J. WooDsIDE. 

